Mountable device holder



FIG. 1 is a perspective view showing an aspect of a new design for a mountable device holder

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a perspective view showing another aspect of a new design for a mountable device holder

FIG. 9 is a front view thereof;

FIG. 10 is a rear view thereof;

FIG. 11 is a left side view thereof;

FIG. 12 is a right side view thereof;

FIG. 13 is a top view thereof; and,

FIG. 14 is a bottom view thereof.

The portions of the mountable device holder in FIGS. 1-4 shown in broken lines are included to show features that form no part of the claimed design. 

CLAIM The ornamental design for a mountable device holder, as shown and described. 